Adding a Zvol Managing Zvols Cloning a Zvol from a Snapshot A ZFS Volume (zvol) is a dataset that represents a block device or virtual disk drive. TrueNAS requires a zvol when configuring iSCSI Shares. Adding a virtual machine also creates a zvol to use for storage.
Storage space you allocate to a zvol is only used by that volume, it does not get reallocated back to the total storage capacity of the pool or dataset where you create the zvol if it goes unused.
Zvol Widgets Zvol Details Widget Delete Zvol Zvol Space Management Widget ZFS Encryption Widget Data Protection Widget Add Zvol Screen Basic Options Settings Advanced Options Settings Data Compression Algorithms Encryption Options The zvol screens and widgets, accessed from the Datasets screen, allow you to add or edit a zvol and manage the volume storage. Like datasets, zvols are listed on the Datasets screen tree table.
The tree table includes storage space used and available for that zvol (or dataset), encryption status (locked, unlocked, or unencrypted), and the role of that zvol or dataset or what service uses it (i.
Snapshots Screen Show Extra Columns Snapshot Details Screen Dataset Rollback from Snapshot Window Clone Snapshot and Promote Dataset Delete Snapshot Batch Operations - Delete Add Snapshot Screen The Snapshots screen, accessed from the Datasets screen by clicking Manage Snapshots on the Data Protection widget, provides a list of existing snapshots filtered for the snapshot you selected, allows you to add new or manage existing snapshots.
The Snapshots screen also opens when you click Snapshots on the Periodic Snapshot Tasks widget found on the Data Protection screen.
